Improvement in steam-engines



U amish jaar 'Cerca @im JOEL SHARP AND JOSPH W. THOMPSON, OF SALEM, OHIO.

' Letters .Patentv'Na 111,982, datedFehruary 2l, 1871.

IMPROVEMENT -lN STEAM-ENGINES.

The Schedule referred to in these'Letters Patent and making parl: of the same.

To all whom it 'may concern;

Beit kbwn that we, JOEL SHARP and JOSEPH XV. THOMPSON, of- Sale1n, county of Columbiana and State of Ohio, have invented certain new and useful Improvemeutsin Steam-Engines, of which thefollcw- -ingis a description, reference being had to the accompanying drawing making'part' of this specifica'- ton.

lS'pecicction.

for the engine, and the arrangement of the force? Dump- The boiler A, igs. 1- and 2, is upright, and, eXc-epting its base, may be of the usual construction.

The bell-shaped or `flaring base A' is east-iron, and answers the triple purpose ot' base `or foundation for the machine, ash-box, and' ring or division, to separatev the {ire-box from the outside shell of the boiler.

This base forms the floor-pan B, which is watertight; it serves as the bottom of the ash-box, of which dis the door, and a receptacle for all the drippiugs from the engine, and dispenses with the necessity of a layer of brick, Stel, on' the door or under the engine,` and if water is placed in the door-pan or basin B, the lire-will be completely surrounded with water in this circular basin, thus giving security against the dauger of irefrom the fire-'borg' of which f is the door.

-rBhe ring or division indicated by the dotted lines g, iig. l, forms the upper part of the base A', and is cast all in one piece; within this ring is the tire-box chamber.' v l y The grate-.bars ale indicated by the dotted line e. Below the grate is the ash-box, which is a close, tight chamber, the walls of which are formed by the base A', the opening into the ash-box being through the door al.

In iigs. l and 2, G represents the smoke-chamber, which is .in communication with the boiler-dues and chimney G', attached to said chamber and through which chamber is au. opening to receive the engineshaft. "lhisshai't extends acrossthe top-oi' the-boiler v through said opening. lo prevent smoke,l&c., from escaping into vthe said' ope ing it is' closed to the v smoke-chamber with a casingof iron, to prevent the escape of smoke, Sto.

'The pillow-blocks K K,'for thedriving-shaft, are

placed on the top of the boiler to admit of said shaft' being hung transverselyacross the top of the boiler, as' secu iu iig. l, which admits of the engine being attached to the side of the boiler, as seen in gs. 1 and., and thereby in connection with said shaft on which is placed D, (answering to the bedplate,) pillow-block K', lug l1, and flange K, are (ll cast in one'piece; the lug K making the main attachment and support of theengine to the boiler, which attachmentor lug is below or under the pillow-block I and is at right angles to the lineof the engine. rlhis lug is bolted firmly to `the boiler, and the lug b, attached to the-cylinder,

is secured to the side ot' the boiler by any suitable means.

Said engine consists, in part, ot the cylinder B',

Asteam-chest G, bed-plate D, piston E, which is connected to thecrank by the piiman I, from the wristpin a. l v

From crank F projects an arm, H, iig. 3, having a cross-piece, I, iu which'is a slot, l). To said arm, by means of the slot, is attac-hed the valve-rod J..

`1t will bc observed that the length of the arm is such as to extend inwardly beyond the axis of the crank F, on the shaft K; hence, as the crank revolves, the cross-piece I will revolve around the center ot' the crank, and the two extreme ends of the slot most distant from the axis willv describe the largestlcircle, and will, therefore, operate the rod J, and to a greater.

extent when attached to either' of the two ends of the slot than when connected at or near the middle thereof'. l

`From this it will be obvious that the throw of the valve will be in proportion to the distance that the connection of the rod with cross-piece I is from the middle of the slot l) therein. Hence, the throw of the .valve cau be-easily adjusted by loosening the unt cpt the wrist, whereby the valve-rodis attached to 'the arm, and moving itin either direction toward or from the lmiddle ofthe slot. the valve motion and'cut-ci is produced.

The valve, as stated, is operated by the return arm or crank H, connected with the valve-rod J, and directly to the valve-stem J The arm H Vreaches back to or a little beyond the cent-er of motion when it is slotted to receive the wrist-pin a. This slot is at rightangles withg the line of the crank, so that when the wrist is iu the center of the slot, the top andthrow of the valve are equal,

the fly-wheel and driving-pulley on' .the opposite side from the engine*l y The'cylinder B', steanrchest O, slides M, section y By this arrangement' and no steam is admitted to the cylinder. New, by shifting the said Wrist from. its central position, steam will be admitted, and the direction in which the wrist is moved in the slotand the distance, Will determine thefamonnt of cnt-oli', and aiso the direction lwhich the engine is to run. 'lhe engine is in this way reversible, and the cut-oli" to the fullest extent-adjustable without deranging the timeoi'induction or exhaust.

Thisis particularly important and valuable in engines of this class for the purposes designed.

The force-pump R isprevided with thev usual appendages and devices 'for receiving water and discharging it into the boiler.' This pump is att-ached to the lower end of the cylinder b f' a bail or bracket, S.

The extension T, fig. 2, of the piston-rod passes through a stuiiing-box in the lower head ofthe cylinder, and extends into the pump forming the pumpplunger.

The said pump is worked by the action of the extension end otthepiston-rod.

Engines 0f this construction may be horizontal as well tis-vertical, and the several parts ot' the engine thus constructed and arranged form a unity, and have the advantage of always being in line one with the other after the engine is completed.

feast in one piece, and thepump R, in

2. The arrangement oi' the drivingshaft transversely across the top of' the boiler in pillow-blocks K K', and at right angles to the line of. the engine, arranged in relation to the sn'iokefchamberG, substantially as and for the purpose set forth.`

3, The base A', wit-l1 the circular basin B, as arranged, in combination with the boiler-A, for the p`in'-' poses and in the manner substantially as set forth.

4. The arrangement of the arm H with the piece l, having a slot at right angles to said arm, in coinbination with the crank-pin a, wrist and'link J, operating conjontly, as and for the purpose substantially set forth.

' JOEL SHARP. Witnesses:. JOSEPH W. TI-IOlVIlSON.

. W.H..BUn1nDG-n, I

ln'rnn AMB'LEn. 

